The Use of Paleomagnetic Data to Provide Constraints on Dynamo Models and the Evolution of the Earth's Core

PI将更新和分析古地磁数据， 在过去的五百万年里， 关于极性不对称问题，并确定 古长期变化的纬向变化。 初步 分析表明， 平均场ATA（以及仅平均场数据）的不对称性。 这种不对称性是由于热电 将研究地震D”区的影响。 分析 本领域使用类似于由 熔岩流古长期变化研究中的古地磁学家 指出了一种方法，通过这种方法， 发电机理论的四极族可以通过以下方式区分： 分析古地磁数据 将进行详细分析 使用年龄小于5年的岩石的更新数据集 百万年。 如果在这段时间内成功， 方法将应用于及时更新的数据， 白垩纪

The PI will update and analyze paleomagnetic data for the last five million years to carry out robust statistical analyses on the polarity asymmetry problem and to determine the origin of the latitudinal variation of paleosecular variation. Preliminary analyses indicate that there is some discernible polarity asymmetry for the mean field ata (and only mean field data). The possibility that this asymmetry is due to thermal electric effects in the seismic D" region will be examined. Analyses of the present field using procedures analogous to those used by paleomagnetists in paleosecular variation studies of lava flows indicate a method by which for the first time the dipole and quadrupole families of dynamo theory can be distinquished by analyzing paleomagnetic data. Detailed analyses will be carried out using an updated data set for rocks with ages less than five million years. If successful for this period of time, the methods will be applied to updated data going back in time to the Cretaceous.